Hi guys!
In this case the supplier is an ok guy and he was very sorry, but he didn't know the difference just as I didn't either.
But, having brand new original Citroen parts, and not being able to use them, bothered me, so I put a thread into the Danish Citroen Forum. At first I considered to extend the pull rods, but a guy from DCK (Danish Citroen Club), Fyn, came up with an idea how to solve the problem.
Instead of extending the pull rods, he suggested that one should grind a little metal of and swap the s-shaped and flat middle piece. So I did and it works!
Here is a picture where the wiper shaft has been disassembled and the axle is pulled out.

The axle got a little tap grease, since this does not damage the o-rings, before they were reassembled.
The s-shaped middle piece went on so tightly that I had use a vise to push it back on. I gave it a weld blob to to secure it.

Here it's put together again and now the pull rods is parallel again. So that' s the way to fix it using wiper shafts from a 2cv.
(refurbished below)
